1901-2000 Degrees Fahrenheit 1 37.8 39.5 -1.7 46 84 1960 2012 1912 1911 normal 2 31.5 34.5 -3.0 24 106 1978 2012 1912 1911 bottom-third 1905 3 31.8 31.8 0.0 58 72 1978 2012 1912 1911 normal 1897,1928,1943 4 31.9 31.5 0.4 67 62 1978 2012 1912 1911 normal 1911,1967,2018 5 33.7 33.4 0.3 63 66 1978 2012 1912 1910 normal 2019 6 37.0 36.8 0.2 62 67 1978 2012 1912 1909 normal 1989 7 41.3 41.0 0.3 72 57 1977 2012,2017 1912 1909 normal 1916,1937,1945,1985,2013 8 44.9 44.9 0.0 58 71 1977 2017 1912 1909 normal 1900,1988 9 48.2 48.2 0.0 58 71 1977 2012 1912 1909 normal 1900,1966,1985 10 50.1 50.4 -0.3 46 83 1977 2012 1912 1909 normal 1925,1943,1952,1967,1984 11 51.3 51.4 -0.1 56 73 1918,1977 2012 1912 1909 normal 1952,1971 12 51.4 51.3 0.1 59 70 1918 2012 1912 1909 normal 1971 18 44.8 46.5 -1.7 7 121 1905 2017 1905 1912 bottom-tenth 24 50.3 51.3 -1.0 15 113 1905,1978 2017 1912 1911 bottom-third 1904,1952,1959,1977 36 50.3 51.3 -1.0 10 117 1979 2018 1912 1911 bottom-tenth 1904,1969 48 50.4 51.3 -0.9 12 114 1980 2019 1908 1912 bottom-tenth 1908 60 50.8 51.3 -0.5 25 100 1981 2020 1912 1911 bottom-third 1909,1928,1966,1968,1969,1984